Reinforced-concrete floor construction



F. M. BARTON. REINFORCED cowcnm FLOOR consmucnou APPLICATION FILED MAYZZ. I916- Patented Oct. 14, 1919.

v THE COLUMBIA PLANUURAPH c0.. WASHINGTON, D. c.

UNITED STATES PATENT oFFIcE.

FRANCIS M. BAR'TON, or CHICAGO, ILLINOIS.

REINFORCED-CONCRETE FLOOR CONSTRUCTION.

Specification of Letters Patent.

Patented Oct. 14, 1919.

Application filed May 22, 1916. Serial No. 99,065.

To all whom it may concern:

Be it known that I, FRANCIS M. BARTON,

was to be passed through the floor to reinforce the floor and keep the opening clear.

In practice, it has been found that this construction was not durable, because of the different coefficients of expansionof the metallic sleeve and the concrete floor. The object of the invention is to provide an improved rein'forcement around holes for the pipes in concrete floors, which will be durable and in which the compression and shearing values of the reinforcement are retained without the use of a sleeve. p

The invention consists in the features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings: Figure lis a section of a flat slab floor construction embodying the invention. Fig. 2 is a horizontal section.

3denotes a flat slab floor and 4 the slab reinforcement, usually consisting of rods between column-head reinforcements and disposed in the lower portion of the floor of the concrete. The hole 5 is formed in the concrete for the passage of a pipe 6. A wire coil 7 the diameter of which is somewhat larger than the diameter'of the hole 5, is embedded in the concrete around the hole and extends from the top of the floor to about the center thereof. In'practice,it has been found that a reinforcement around an opening fora pipe, formed of a coil, as shown, provides an efficient reinforcement around the opening and this reinforcement retains the compressions and shearing values of the floor around the pipe and attains this result with a minimum amount of metal, so that the reinforcement is not only eflicient but is inexpensive.

The invention isnot to be understood as V restricted to the details set forth, since these may be modified'within the scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention,

what I claim as new and desire to secure by Letters Patent, is:

1. Ina concrete floor construction, the

combination of a concrete floor, slab-reinv forcement 1n the lower portlon of the floor,

the floor having an opening for a pipe extending entirely through the floor, and a me tallic coil embedded in the concrete of the floor around the opening, and comprising loops. disposed vertically of one another and extending from the top of the slab downwardly and terminating above the bottom of the slab, the slab reinforcement being separate from the coil.

2. In a concrete floor construction, the combination of a concrete floor, slab-reinforcement in the lower portion of the floor, the floor having an opening for a pipe extending entirely through the floor, and a metallic coil greater in diameter than and spaced outwardly from the hole and embedded in theconcrete of the fioo r around the opening, and comprising loops disposed vertically of one another and extending downwardly from the top of the slab toapproximately its' middle, the slab reinforce: ment being separate from the coil.

FRANCIS M. BARTON.

copiel of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington; D. G. 

